- B/1 Test Routines, 1953-1954
- B/2 Polya, includes paper "On Liouville's Function", 1959-1968.
- B/3 Rulers (Difference Bases), 1957-1958,1963-1970.
- B/4 Brian Randell, including three papers on origins of digital computing, Turing, Babbage and the Colossus Project, 1968-1976.
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- ReferenceGB 133 NAHC/HAS/B
- Dates of Creation1953-1976